##
#
# Snaarpy: Guitar chord parser and formatter
# Copyright (C) 2009 Alberto Gonzalez
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
##

from latex import LatexFileWriter
import tempfile
import os, subprocess, shutil
import logging
logger = logging.getLogger(__name__)

class PdfFileWriter(LatexFileWriter):
    extension = "pdf"
    description = "LaTeX+PDF file output filter"
    
    def __init__(self, pdf):
        if pdf == None:
            raise Exception("The PDF backend requires an output file name")
        self.pdf = pdf
        self._tempd = tempfile.mkdtemp('', 'snaarpy')
        self._tempf, self._tempname = tempfile.mkstemp('', '', self._tempd)
        LatexFileWriter.__init__(self, os.fdopen(self._tempf, 'w'))
        logging.debug("Temp file: %s" % self._tempname)
    
    def endOutput(self):
        try:        
            LatexFileWriter.endOutput(self)
            pdfargs = ['pdflatex', 
                   '-halt-on-error', '-interaction=batchmode', 
                   '-output-directory=%s' % self._tempd,
                   self._tempname]
            idxargs = ['makeindex',
                   self._tempname + '.idx']
            subprocess.check_call(pdfargs)
            subprocess.check_call(idxargs)
            subprocess.check_call(pdfargs)
            shutil.copy(self._tempname + '.pdf', self.pdf)
        finally:
            shutil.rmtree(self._tempd)
        